浅析电流互感器饱和对发电厂保护的影响和对策

文章简要地分析了电流互感器产生饱和的原因、特性以及对保护产生的影响,并结合工作经验提出了一些实用的对策,为相关工作人员提供参考。     

Identification of Students’ Content Mastery and Cognitive and Affective Percepts of a Bioinformatics Miniunit: A Case Study With Recommendations for Teacher Education

Bioinformatics, merging biological data with computer science, is increasingly incorporated into school curricula at all levels. This case study of 10 secondary school students highlights student individual differences (especially the way they processed information and integrated procedural and analytical thought) and summarizes a variety of critical situations that teachers may encounter when teaching bioinformatics. Students who integrated factual information with procedural and analytical skills were closest to content mastery; while students who had fundamental deficiencies in factual recall or were less adept in integrating higher order knowledge with specific facts and procedural skills had difficulty mobilizing critical analytical skills needed to master the bioinformatics tasks. Broader implications are presented for teacher education, curriculum design, and research.     

Bioinformatics in high school biology curricula: a study of state science standards

The proliferation of bioinformatics in modern biology marks a modern revolution in science that promises to influence science education at all levels. This study analyzed secondary school science standards of 49 U.S. states (Iowa has no science framework) and the District of Columbia for content related to bioinformatics. The bioinformatics content of each state's biology standards was analyzed and categorized into nine areas: Human Genome Project/genomics, forensics, evolution, classification, nucleotide variations, medicine, computer use, agriculture/food technology, and science technology and society/socioscientific issues. Findings indicated a generally low representation of bioinformatics-related content, which varied substantially across the different areas, with Human Genome Project/genomics and computer use being the lowest (8%), and evolution being the highest (64%) among states' science frameworks. This essay concludes with recommendations for reworking/rewording existing standards to facilitate the goal of promoting science literacy among secondary school students.     

基于临床实训中心的SP应用研究分析

本课题组在对临床实训中心的教学功能进行全面分析、研究的基础上，通过使用标准化病人（SP）的对比研究，认为标准化病人（SP）的优点在于可充当不同角色，不但能提供学生查体，有效地与学生进行沟通，而且作为重要评估者，能客观、公正地对学生学习情况进行评价，大大调动了学生学习的积极性。但由于SP缺乏阳性体征，只能作正常体格检查训练。故将临床实训中心模型与SP二者充分结合起来，从正常到异常，从模型到人体，设计不同案例，真假结合，通过训练培养学生的临床思维能力、判断能力以及掌握操作技巧。